红带网纹蓟马对几种寄主植物的适合度研究

【背景】红带网纹蓟马扩散范围大且寄主植物广泛，以若虫、成虫锉吸为害植物花、叶及幼果，严重影响植物美观和果实质量。然而，有关红带网纹蓟马对不同寄主植物适合度的研究较少。【方法】在室内用不同寄主植物饲喂红带网纹蓟马，每天观察并记录其若虫、预蛹、蛹的死亡及发育情况，每2 d观察1次红带网纹蓟马成虫寿命和产卵情况。【结果】红带网纹蓟马若虫、预蛹均不能在乌桕、砂梨、泡桐、碧桃及构树上完成发育，但蛹能发育为成虫；在二球悬铃木、石楠、杜鹃、板栗上各虫态都能正常发育。其中，1龄若虫在石楠上发育到成虫的时间最长，为8.50 d；2龄若虫在杜鹃上发育到成虫的时间最长，为6.90 d；预蛹在板栗上的发育时间最长，为5.50 d；蛹在构树上的发育时间为5.70 d。不同寄主植物对红带网纹蓟马成虫寿命的影响存在显著差异，红带网纹蓟马成虫在二球悬铃木和石楠上的寿命长达7 d以上，在杜鹃上为5.80 d，而在板栗上为3.50 d；红带网纹蓟马在二球悬铃木、石楠、杜鹃、板栗上的产卵量高于其他寄主植物，但不存在显著差异。【结论与意义】二球悬铃木、石楠、杜鹃、板栗是红带网纹蓟马适宜的寄主植物。

The suitability of several host plants for the thrips Selenothrips rubrocinctus

【Background】Selenothrips rubrocinctus （Giard） is widely distbitued in China and has many host plants. The larvae and adults destory flowers, leaves and the young fruit by its rasping sucking mouthparts, which seriously influence the appearance of plant and the quality of fruits. There are, however, very few studies on host plant suitability on various host plants. 【Method】S.rubrocinctus were fed on different plants in the laboratory, with the developmental duration and mortality in the nymph instars, pre-pupa and pupal stage recorded daily; longevity and dault oviposition were also recorded. 【Result】S.rubrocinctus can not complete their nymphal and pre-pupal development on Sapium sebifera, Pyrus pyrifolia, Paulowinia fortunei, Prunus persicaf.duplex and Broussonetia papyrifer, the species can complete its individual development on Platanus acerifolia, Photinia serrulata, Rhododendron simsii, and Castanea mollissima. The longest development from 1st instars to adults was 8.5 d on Photinia serrulata, from 2nd nymphal instar to adult was 6.9 d on R.simsii, the longest recorded pre pupa stage was 5.5 d on C.mollissima, and of pupa stage was 5.7 d on B.papyrifera; There were significant differences in adult longevity when fed on different host plants. The adult longevity of S.rubrocinctus on Platanus acerifolia and Photinia serrulata were the highest （〉7 d）, were 5.8 d on R.simsii, and 3.5 d on C.mollissima. There were no significant difference in fecundities in females fed on different host plants, while the oviposition of S.rubrocinctus on Platanus acerifolia, Photinia serrulata, R.simsii, C.mollissimawere higher than other host palnts. 【Conclusion and significance】Platanus acerifolia, Photinia serrulata, R.simsii, C.mollissima were the most suitable host plants for S.rubrocinctus in this study.